The harmonic mean of the roots of the equation \( (4+\sqrt{2}) x^{2... VIDEO
The harmonic mean of the roots of the equation \( (4+\sqrt{2}) x^{2}-(4+\sqrt{5}) x+(8+2 \sqrt{5})=0 \) is
(A) 2
(B) 4
\( \mathrm{P} \)
(C) 7
(D) 8
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